CN111608858B - Method and device for adjusting output power of wind generating set, computer readable storage medium and wind power generation system - Google Patents
Method and device for adjusting output power of wind generating set, computer readable storage medium and wind power generation system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/329—Azimuth or yaw angle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The embodiment of the invention provides a method and a device for adjusting output power of a wind generating set, a computer readable storage medium and a wind power generation system. The method for adjusting the output power of the wind generating set comprises the following steps: acquiring operation data of the wind generating set; determining a state of the wind turbine generator set based on the operational data; calculating the turbulence degree of the machine position where the wind generating set is located based on the operation data; and adjusting a pitch angle set value or a power set value of the wind generating set based on the state of the wind generating set and the calculated turbulence degree to adjust the output power of the wind generating set. The embodiment of the invention can increase the generating capacity of the wind generating set as much as possible on the premise of ensuring the safety of the wind generating set.
Description
Technical Field
The embodiment of the invention relates to the technical field of wind power, in particular to a method and a device for adjusting output power of a wind generating set, a computer readable storage medium and a wind power generation system.
Background
With the continuous development of wind power technology, the application of wind power generation systems in power systems is increasing day by day. At present, the method for adjusting the output power of a wind generating set mainly comprises the following steps:
the method comprises the steps of determining a rated wind speed of a wind generating set, acquiring a target wind speed in front of an impeller of the wind generating set, monitoring the turbulence degree and the operating temperature of the wind generating set, and controlling the wind generating set to operate at a target power within a preset time when the turbulence degree and the operating temperature are within a certain interval and the target wind speed is within a preset wind speed interval. And when the turbulence exceeds a preset threshold value, controlling the pitch angle of the wind generating set to limit power or carrying out sector protection shutdown on the wind generating set. Although the scheme can improve the power generation capacity of the wind generating set under high wind speed and low turbulence, the improvement of the power generation capacity only considers the condition that the turbulence above the full wind speed is low, and has certain limitation.
And secondly, for the situation that the actual turbulence exceeds the designed value, a sector control method is generally adopted. In the sector with larger turbulence, the load of the wind turbine generator set is reduced by reducing the rated value of the power set point. Furthermore, there are also direct shutdowns in high turbulence sectors to reduce the load of the wind park. However, in this solution, in order to ensure the safety of the operation of the wind turbine, the direct power limiting or shutdown of the highly turbulent sectors may greatly affect the availability of the wind turbine.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for adjusting output power of a wind generating set, a computer readable storage medium and a wind generating system.
One aspect of an embodiment of the present invention provides a method of adjusting an output power of a wind turbine generator system. The method comprises the following steps: acquiring operation data of the wind generating set; determining a status of the wind turbine generator set based on the operational data; calculating the turbulence degree of the machine site where the wind generating set is located based on the operation data; and adjusting a pitch angle set value or a power set value of the wind turbine generator set based on the state of the wind turbine generator set and the calculated turbulence level to adjust the output power of the wind turbine generator set.
Another aspect of the embodiments of the present invention further provides a device for adjusting the output power of a wind turbine generator system. The apparatus includes one or more processors for implementing the method of adjusting the output power of a wind park as described above.
Yet another aspect of the embodiments of the present invention also provides a computer readable storage medium, on which a program is stored, which, when being executed by a processor, carries out the method of adjusting the output power of a wind park as described above.
Yet another aspect of an embodiment of the present invention also provides a wind power generation system. The wind power generation system comprises a wind power generator set, a signal acquisition device, a control device and an execution device. The signal acquisition device is used for acquiring the operating data of the wind generating set. The control device comprises the device for adjusting the output power of the wind generating set. The executing device is used for receiving the pitch angle set value or the power set value output by the device for adjusting the output power of the wind generating set and adjusting the pitch angle or the rated power of the wind generating set according to the pitch angle set value or the power set value.
One or more embodiments of the present invention may determine a state of the wind turbine generator system according to the operational data of the wind turbine generator system, calculate a turbulence level of a site where the wind turbine generator system is located, and then adjust a pitch angle setting value or a power setting value of the wind turbine generator system based on the state of the wind turbine generator system and the calculated turbulence level, so that an output power of the wind turbine generator system may be adjusted according to the state of the wind turbine generator system and the calculated turbulence level throughout an operational wind speed range.
One or more embodiments of the present invention may use the existing sensor to adjust the output power of the wind turbine generator system according to the state of the wind turbine generator system and the calculated turbulence level in the entire wind speed range, so as to increase the power generation of the wind turbine generator system as much as possible while ensuring the safety of the wind turbine generator system.
Drawings
FIG. 1 is a flow chart of a method of adjusting the output power of a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 illustrates the specific steps of adjusting the pitch angle setting or power setting of a wind turbine generator system according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of one embodiment of adjusting a pitch angle setting or a power setting of the wind turbine generator set shown in FIG. 2;
FIG. 4 is a schematic block diagram of an apparatus for adjusting the output power of a wind turbine generator according to an embodiment of the present invention;
FIG. 5 is a schematic block diagram of a wind power generation system of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Fig. 1 discloses a flow chart of a method for adjusting the output power of a wind turbine generator system according to an embodiment of the invention. As shown in fig. 1, the method for adjusting the output power of the wind turbine generator set according to one embodiment of the present invention may include steps S1 to S4.
In step S1, operational data of the wind turbine generator set is acquired.
The operational data of the wind park may comprise a plurality of data of wind speed, output power, generator rotational speed, pitch angle, pitch speed, nacelle vibration acceleration, nacelle displacement and nacelle thrust of the wind park.
The wind speed can be measured by a wind meter (e.g., a wind cup, a lidar, etc.) in the wind turbine generator set. The output power of the wind generating set is obtained by the converter through voltage and current calculation and fed back to the wind generating set. The generator speed may be measured by a speed measuring device. The pitch angle can be measured by a motor encoder and an absolute value encoder of a pitch system. The pitch speed can be calculated through the pitch angle. The nacelle vibration acceleration may be measured by an accelerometer mounted on the nacelle. The cabin displacement and the cabin thrust can be obtained through cabin vibration acceleration calculation or measured through a tilt sensor and a Beidou positioning system.
In step S2, a status of the wind park is determined based on the operational data of the wind park.
The states of the wind generating set comprise a full-open state and a non-full-open state.
In some embodiments, the full-run state refers to the power setting value of which the 30s average value of the output power of the wind generating set is greater than 0.95 times, and the pitch angle is greater than the minimum pitch angle plus 0.5 degrees.
In some embodiments, it may be determined whether the state of the wind park reaches a full-blown state based on the wind speed, the output power, and the pitch angle.
In step S3, the turbulence level of the site where the wind turbine generator set is located is calculated based on the operation data of the wind turbine generator set.
Turbulence is a variable used to characterize wind speed fluctuation conditions. The turbulence can be obtained by calculating the standard deviation of the pitch speed and the vibration acceleration of the nacelle. The calculation formula of the standard deviation σ is shown as follows:
for example, in calculating the standard deviation of the pitch speed, xiRepresenting the real-time pitch speed value,
represents the average value of the pitch speed. In calculating the standard deviation of the nacelle vibration acceleration, xiRepresenting real-time values of the nacelle vibration acceleration,
represents the average value of the vibration acceleration of the nacelle. In one embodiment, the turbulence level may be calculated using 50-100s of operating data.
However, under the same wind turbulence degree found in the simulation calculation, the standard deviation of the vibration acceleration of the nacelle and the pitch speed is different, so when the standard deviation of the vibration acceleration of the nacelle and the pitch speed is used for reflecting the wind turbulence degree, the information of the wind speed is also required to be combined to make sense.
When the pitch angle is below the rated value, the wind generating set does not start, the pitch angle is kept to be the optimal pitch angle, and the pitch angle of the wind generating set is kept unchanged, so that the pitch speed does not exist, and the standard deviation is 0; even if the pitch angle is adjusted based on the turbulence, the pitch is not changed frequently, and therefore, the standard deviation of the vibration acceleration of the nacelle is adopted to represent the turbulence below the rated value. In some embodiments, the turbulence level may be calculated based on a standard deviation of the nacelle vibration acceleration when the state of the wind turbine generator set does not reach a full-blown state.
However, the calculation of the turbulence level when the state of the wind turbine generator set does not reach the full-load state according to the embodiment of the present invention is not limited to the calculation using the standard deviation of the vibration acceleration of the nacelle. In other embodiments, the turbulence level may also be calculated based on the nacelle displacement or the standard deviation of the nacelle thrust when the state of the wind turbine generator set does not reach the full-blown state.
Because the pitch angle of the wind generating set changes along with the change of the wind speed above the rated value, the standard deviation of the pitch changing speed can well reflect the turbulence degree. Thus, in some embodiments, the turbulence level may be calculated based on the standard deviation of the pitch speed when the state of the wind park reaches a full-blown state. Of course, the standard deviation of the nacelle vibration acceleration may also be used, but it is more intuitive to use the standard deviation of the pitch speed.
However, the calculation of the turbulence level when the state of the wind turbine generator system reaches the full-power state is not limited to the calculation using the standard deviation of the pitch speed. Because both the pitch speed and the pitch angle can be used for representing the frequency degree of the pitch action, and further can be used for representing the turbulence degree of the wind generating set. Thus, in other embodiments, the turbulence level may also be calculated based on the standard deviation of the pitch angle when the state of the wind park reaches a full-blown state.
In step S4, a pitch angle set value or a power set value of the wind turbine generator set is adjusted based on the state of the wind turbine generator set and the calculated turbulence level to adjust the output power of the wind turbine generator set.
How to adjust the pitch angle set point or power set point of the wind park based on the state of the wind park and the calculated turbulence will be described in detail below in connection with fig. 2.
As shown in fig. 2, in step S41, it is determined whether the wind turbine generator set has reached a full-wind state, and if the determination result is no, the process proceeds to step S42. Otherwise, the process proceeds to step S43.
In step S42, when the state of the wind turbine generator set does not reach the full-blown state, the pitch angle setting value of the wind turbine generator set is adjusted based on the calculated turbulence level.
In some embodiments, step S42 may further include steps S421 to S423. In step S421, the calculated turbulence level is compared with the design turbulence level of the wind turbine generator system, and it is determined whether the calculated turbulence level is less than the design turbulence level. If the determination result is yes, the process proceeds to step S422. Otherwise, the process proceeds to step S423. In step S422, when the calculated turbulence level is less than the design turbulence level of the wind turbine generator system, the pitch angle setting value of the wind turbine generator system is decreased, thereby increasing the output power of the wind turbine generator system. In step S423, when the calculated turbulence level is greater than the design turbulence level of the wind turbine generator set, the pitch angle setting value of the wind turbine generator set is increased to decrease the output power of the wind turbine generator set.
In step S43, when the state of the wind turbine generator set reaches the full-blown state, the power set value of the wind turbine generator set is adjusted based on the calculated turbulence level.
In some embodiments, step S43 may further include steps S431 through S433. In step S431, the calculated turbulence level is compared with the design turbulence level of the wind turbine generator system, and it is determined whether the calculated turbulence level is less than the design turbulence level. If the determination result is yes, the process proceeds to step S432. Otherwise, the process proceeds to step S433. In step S432, when the calculated turbulence level is less than the design turbulence level of the wind turbine generator system, the power setting value of the wind turbine generator system is increased to increase the output power of the wind turbine generator system. In step S433, when the calculated turbulence level is greater than the design turbulence level, the power set value of the wind turbine generator system is decreased, so as to decrease the output power of the wind turbine generator system.
The method for adjusting the output power of the wind generating set can increase the output power of the wind generating set under the condition of small turbulence and reduce the output power of the wind generating set under the condition of large turbulence, so that the generated energy of the wind generating set can be increased as much as possible on the premise of ensuring the safety of the wind generating set.
FIG. 3 discloses a schematic diagram of one embodiment of adjusting the pitch angle setting or power setting of the wind turbine generator set shown in FIG. 2. As shown in fig. 3, in step S50, it is determined whether the state of the wind turbine generator system has reached a full-blown state.
In step S51, the calculated turbulence level is compared with a threshold value. And performing corresponding processing based on different comparison results.
In the case that the state of the wind turbine generator set does not reach the full-open state, the step S51 may further include steps S52 to S55. In step S52, when the calculated turbulence is less than the first threshold, the first pitch angle Pit1 is added to the pitch angle setting. In step S53, when the calculated turbulence is less than the second threshold, the second pitch angle Pit2 is added to the pitch angle setting. In step S54, when the calculated turbulence is greater than the third threshold, the third pitch angle Pit3 is added to the pitch angle setting. In step S55, when the calculated turbulence is greater than the fourth threshold, the fourth pitch angle Pit4 is added to the pitch angle setting. Wherein the design turbulence is between the second threshold and the third threshold, and the first pitch angle Pit1< the second pitch angle Pit2<0< the third pitch angle Pit3< the fourth pitch angle Pit 4.
When the state of the wind generating set does not reach the full-power state and the calculated turbulence degree is smaller than a second threshold value, adding a negative pitch angle on the current pitch angle set value so as to increase the output power of the wind generating set; when the state of the wind generating set does not reach the full-power state and the calculated turbulence degree is greater than a third threshold value, a positive pitch angle is added to the current pitch angle set value, so that the output power of the wind generating set is reduced, and the running load of the wind generating set is further reduced to ensure the safety of the wind generating set.
Because the fatigue loads of the wind generating sets are different under the same wind speed and different turbulence degrees, in the embodiment of the invention, the pitch angle smaller than zero is provided with the first pitch angle Pit1 and the second pitch angle Pit2, and the pitch angle larger than zero is provided with the third pitch angle Pit3 and the fourth pitch angle Pit4, so that the wind energy under the small turbulence degree can be fully utilized on the premise of controlling as finely as possible, and the generated energy of the wind generating sets is maximized as far as possible. However, embodiments of the invention are not limited to setting pitch angles greater than zero or less than zero to two. In other embodiments of the invention, the pitch angles greater than zero or less than zero may also be set to three or more. However, to avoid frequent switching control, a pitch angle greater than zero or less than zero is also not recommended to be set too much.
In one embodiment, first pitch angle Pit1, second pitch angle Pit2, third pitch angle Pit3, or fourth pitch angle Pit4 may be obtained based on the calculated turbulence and output power of the wind turbine generator set and according to a pre-established lookup table of turbulence, output power, and pitch angles.
Therefore, the method for adjusting the output power of the wind generating set according to the embodiment of the invention may further include: a lookup table of turbulence, output power and pitch angle is established in advance through simulation.
In some embodiments, pre-establishing a look-up table of turbulence, output power and pitch angle for an embodiment of the present invention may comprise: before the wind generating set reaches a full-power state, when the turbulence degree of the wind generating set is not equal to the designed turbulence degree, adjusting different pitch angle set values of the wind generating set; selecting fatigue load of the wind generating set which is smaller than the fatigue load under the designed turbulence degree and finding out a corresponding pitch angle set value when the output power of the wind generating set is maximum; taking the difference value between the set value of the pitch angle corresponding to the maximum output power and the optimal pitch angle of the wind generating set as the pitch angle value under the current turbulence degree and the current output power; and repeating the steps to obtain the pitch angle values under different turbulence degrees and different output powers, thereby enabling the generated energy of the wind generating set to be maximum on the premise of ensuring the safety of the wind generating set. Therefore, a look-up table of turbulence, output power and pitch angle can be built according to the obtained pitch angle values at different turbulence and different output power.
With continued reference to fig. 3, in case the state of the wind park reaches the full-power state, step S51 may further include steps S56 to S59. In step S56, when the calculated turbulence level is less than the first threshold value, the first power P1 is added to the power set point. In step S57, when the calculated turbulence level is less than the second threshold value, a second power P2 is added to the power set point. In step S58, when the calculated turbulence level is greater than the third threshold value, a third power P3 is added to the power set point. In step S59, when the calculated turbulence level is greater than the fourth threshold value, a fourth power P4 is added to the power set point. Wherein the design turbulence is between the second threshold and the third threshold, and the first power P1> the second power P2>0> the third power P3> the fourth power P4.
When the state of the wind generating set reaches a full-power state and the calculated turbulence degree is smaller than a second threshold value, adding a positive power to the current power set value so as to increase the power generation amount of the wind generating set under the low turbulence degree; when the state of the wind generating set reaches a full-power state and the calculated turbulence degree is larger than a third threshold value, a negative power is added to the current power set point, so that the power generation amount of the wind generating set under the high turbulence degree is reduced, and the running load of the wind generating set is further reduced to ensure the safety of the wind generating set.
Because the fatigue loads of the wind generating sets are different under the same wind speed and different turbulence degrees, in the embodiment of the invention, the power which is larger than zero is provided with the first power P1 and the second power P2, and the power which is smaller than zero is provided with the third power P3 and the fourth power P4, so that the wind energy under the small turbulence degree can be fully utilized on the premise of controlling as finely as possible, and the generated energy of the wind generating sets is maximized as far as possible. However, embodiments of the present invention are not limited to setting the power greater than zero or less than zero to two. In other embodiments of the present invention, the power greater than zero or less than zero may also be set to three or more. However, to avoid frequent switching control, power greater than zero or less than zero is also not recommended to be set too much.
In one embodiment, the first power P1, the second power P2, the third power P3 or the fourth power P4 may be obtained based on the calculated turbulence and pitch angle of the wind park and according to a pre-established look-up table of turbulence, pitch angle and power.
Therefore, the method for adjusting the output power of the wind generating set according to the embodiment of the invention may further include: look-up tables of turbulence, pitch angle and power are pre-established by simulation.
In some embodiments, pre-establishing a look-up table of turbulence, pitch angle and power of an embodiment of the present invention may comprise: after the wind generating set reaches a full-power state, when the turbulence degree of the wind generating set is not equal to the designed turbulence degree, adjusting different power set values of the wind generating set; selecting a fatigue load of the wind generating set which is smaller than the fatigue load under the designed turbulence degree, and finding a corresponding power set value when the output power of the wind generating set is maximum; taking the difference value between the power set value and the current power set value as the power value of the current turbulence degree and the current pitch angle; and repeating the steps to obtain power values under different turbulence degrees and different pitch angles, so that the generated energy of the wind generating set can be maximized on the premise of ensuring the safety of the wind generating set. Therefore, a look-up table of turbulence, pitch angle and power can be built according to the obtained power values at different turbulence and different pitch angles.
The method for adjusting the output power of the wind generating set can determine the state of the wind generating set according to the operation data of the wind generating set, calculate the turbulence degree of the machine position of the wind generating set, and then adjust the set pitch angle value or the set power value of the wind generating set according to the state of the wind generating set and the calculated turbulence degree, so that the output power of the wind generating set can be adjusted according to the state of the wind generating set and the calculated turbulence degree in the whole operation wind speed range.
The method for adjusting the output power of the wind generating set can use the existing sensor to adjust the output power of the wind generating set according to the state of the wind generating set and the calculated turbulence degree in the whole wind speed range, so that the generated energy of the wind generating set can be increased as much as possible on the premise of ensuring the safety of the wind generating set.
The embodiment of the invention also provides a device 100 for adjusting the output power of the wind generating set. Fig. 4 discloses a schematic block diagram of an apparatus 100 for adjusting the output power of a wind park according to an embodiment of the invention. As shown in fig. 4, the apparatus 100 for adjusting the output power of the wind turbine generator set may include one or more processors 101, and the one or more processors 101 are configured to implement the method for adjusting the output power of the wind turbine generator set according to the above embodiments.
The device 100 for adjusting the output power of the wind generating set according to the embodiment of the present invention has substantially the same beneficial technical effects as the above method for adjusting the output power of the wind generating set, and therefore, the detailed description thereof is omitted.
The embodiment of the invention also provides a computer readable storage medium. The computer readable storage medium has stored thereon a program which, when executed by a processor, implements the method of adjusting the output power of a wind park as described in the various embodiments above.
The embodiment of the invention also provides a wind power generation system 10. FIG. 5 discloses a schematic block diagram of a wind power system 10 according to an embodiment of the invention. As shown in fig. 5, a wind power generation system 10 according to an embodiment of the present invention includes a wind turbine generator 11, a signal acquisition device 12, a control device 13, and an execution device 14. The signal acquisition device 12 may acquire operation data of the wind turbine generator set 11. For example, the signal acquisition device 12 may acquire a plurality of data of the wind speed, the output power, the generator rotation speed, the pitch angle, the pitch speed, the nacelle vibration acceleration, the nacelle displacement, and the nacelle thrust of the wind turbine generator 11.
The control device 13 comprises a device 100 for regulating the output power of a wind park as described above. The signal acquisition device 12 may transmit the acquired operating data of the wind turbine to the device 100 for adjusting the output power of the wind turbine. The device 100 for adjusting the output power of the wind turbine generator system can adjust the pitch angle set value or the power set value of the wind turbine generator system according to the collected operation data of the wind turbine generator system by the method as described above.
The executing device 14 may receive a pitch angle set value or a power set value output by the device 100 for adjusting the output power of the wind turbine generator system, and adjust the pitch angle or the rated power of the wind turbine generator system 11 according to the pitch angle set value or the power set value.
The wind power generation system 10 of the embodiment of the present invention has substantially the same beneficial technical effects as the method for adjusting the output power of the wind power generator set, and therefore, the details are not repeated herein.
The method and the device for adjusting the output power of the wind turbine generator system, the computer readable storage medium and the wind turbine generator system provided by the embodiment of the invention are described in detail above. The method and apparatus for adjusting output power of a wind turbine generator system, a computer readable storage medium, and a wind turbine generator system according to the embodiments of the present invention are described herein by using specific examples, and the above descriptions are only used to help understand the core idea of the present invention and are not intended to limit the present invention. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the spirit and principle of the present invention, and these improvements and modifications should fall within the scope of the appended claims.
Claims (19)
1. A method for adjusting the output power of a wind generating set is characterized in that: the method comprises the following steps:
acquiring operation data of the wind generating set;
determining a status of the wind turbine generator set based on the operational data;
calculating the turbulence degree of the machine site where the wind generating set is located based on the operation data; and
adjusting a pitch angle set point or a power set point of the wind turbine generator set based on the state of the wind turbine generator set and the calculated turbulence level to adjust an output power of the wind turbine generator set,
wherein, when the calculated turbulence level is less than the design turbulence level of the wind turbine generator set, adjusting a pitch angle set value or a power set value of the wind turbine generator set to increase the output power of the wind turbine generator set; when the calculated turbulence level is greater than the design turbulence level, adjusting a pitch angle set value or a power set value of the wind generating set to reduce the output power of the wind generating set.
2. The method of claim 1, wherein: the operational data comprises a plurality of data of wind speed, output power, generator rotating speed, pitch angle, pitch changing speed, cabin vibration acceleration, cabin displacement and cabin thrust of the wind generating set.
3. The method of claim 2, wherein: determining whether a state of the wind turbine generator set reaches a full-run state based on the wind speed, the output power, and the pitch angle.
4. The method of claim 3, wherein: calculating the degree of turbulence based on the wind speed, one of the pitch angle and the pitch speed, one of the nacelle vibration acceleration, the nacelle displacement, and the nacelle thrust.
5. The method of claim 4, wherein: calculating the degree of turbulence based on a standard deviation of the one of the nacelle vibration acceleration, the nacelle displacement, and a nacelle thrust when the state of the wind turbine generator set does not reach a full-blown state.
6. The method of claim 4, wherein: calculating the turbulence level based on a standard deviation of the one of the pitch angle and the pitch speed when a state of the wind turbine generator set reaches a full-blown state.
7. The method of claim 3, wherein: and when the state of the wind generating set does not reach a full-power state, adjusting the set value of the pitch angle of the wind generating set based on the calculated turbulence.
8. The method of claim 7, wherein: when the calculated turbulence level is less than the design turbulence level of the wind turbine generator set, then decreasing the pitch angle set value to increase the output power of the wind turbine generator set; when the calculated turbulence is greater than the design turbulence, then increasing the pitch angle setting to reduce the output power of the wind turbine generator set.
9. The method of claim 8, wherein: adding a first pitch angle to the pitch angle set value when the calculated turbulence is less than a first threshold; adding a second pitch angle to the pitch angle set value when the calculated turbulence is less than a second threshold; adding a third pitch angle to the pitch angle set value when the calculated turbulence is greater than a third threshold; adding a fourth pitch angle into the pitch angle setting when the calculated turbulence is greater than a fourth threshold, wherein the design turbulence is between the second threshold and the third threshold, and the first pitch angle < the second pitch angle <0< the third pitch angle < the fourth pitch angle.
10. The method of claim 9, wherein: obtaining the first pitch angle, the second pitch angle, the third pitch angle, or the fourth pitch angle based on the calculated turbulence and the output power of the wind turbine generator set and according to a pre-established lookup table of turbulence, output power, and pitch angle.
11. The method of claim 10, wherein: further comprising: pre-building a look-up table of the turbulence level, the output power and the pitch angle by simulation, the pre-building the look-up table of the turbulence level, the output power and the pitch angle comprising:
before the state of the wind generating set reaches a full-power state, when the turbulence degree of the wind generating set is not equal to the design turbulence degree, adjusting different pitch angle set values of the wind generating set;
selecting the fatigue load of the wind generating set to be smaller than the fatigue load under the designed turbulence degree and finding out the set value of the corresponding pitch angle when the output power of the wind generating set is maximum;
taking the difference value between the corresponding pitch angle set value when the output power is maximum and the optimal pitch angle of the wind generating set as the pitch angle value under the current turbulence degree and the current output power; and
and repeating the steps to obtain the pitch angle values under different turbulence degrees and different output powers, thereby establishing a lookup table of the turbulence degrees, the output powers and the pitch angles.
12. The method of claim 3, wherein: adjusting a power setting of the wind turbine generator set based on the calculated turbulence level when the state of the wind turbine generator set reaches a full-blown state.
13. The method of claim 12, wherein: when the calculated turbulence level is less than the design turbulence level of the wind turbine generator system, then increasing the power set point to increase the output power of the wind turbine generator system; when the calculated turbulence level is greater than the design turbulence level, then the power set point is decreased to decrease the output power of the wind turbine generator set.
14. The method of claim 13, wherein: increasing a first power into the power setpoint when the calculated turbulence is less than a first threshold; increasing a second power into the power setpoint when the calculated turbulence is less than a second threshold; increasing a third power into the power setpoint when the calculated turbulence is greater than a third threshold; adding a fourth power into the power setpoint when the calculated turbulence is greater than a fourth threshold, wherein the design turbulence is between the second threshold and the third threshold, and the first power > the second power >0> the third power > the fourth power.
15. The method of claim 14, wherein: obtaining the first power, the second power, the third power, or the fourth power based on the calculated turbulence and pitch angle of the wind turbine generator set and according to a pre-established lookup table of turbulence, pitch angle, and power.
16. The method of claim 15, wherein: further comprising: pre-building a look-up table of the turbulence level, the pitch angle and the power by simulation, the pre-building the look-up table of the turbulence level, the pitch angle and the power comprising:
after the state of the wind generating set reaches a full-power state, when the turbulence degree of the wind generating set is not equal to the design turbulence degree, adjusting different power set values of the wind generating set;
selecting the fatigue load of the wind generating set to be smaller than the fatigue load under the designed turbulence degree and finding out a corresponding power set value when the output power of the wind generating set is maximum;
taking the difference value between the power set value and the current power set value as the power value of the current turbulence degree and the current pitch angle; and
and repeating the steps to obtain power values under different turbulence degrees and different pitch angles, thereby establishing a lookup table of the turbulence degrees, the pitch angles and the power.
17. An apparatus for adjusting the output power of a wind park, the apparatus comprising one or more processors for implementing a method of adjusting the output power of a wind park according to any one of claims 1 to 16.
18. A computer-readable storage medium, characterized in that it has a program stored thereon, which, when being executed by a processor, carries out the method of adjusting the output power of a wind park according to any one of claims 1-16.
19. A wind power generation system characterized by: the wind power generation system includes:
a wind generating set;
the signal acquisition device is used for acquiring the operating data of the wind generating set; and
a control device comprising a device for adjusting the output power of a wind park according to claim 17; and
and the executing device is used for receiving the pitch angle set value or the power set value output by the device for adjusting the output power of the wind generating set and adjusting the pitch angle or the rated power of the wind generating set according to the pitch angle set value or the power set value.
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| US8858174B2 (en) * | 2011-05-12 | 2014-10-14 | General Electric Company | Wind turbine torque-speed control |
| US9784241B2 (en) * | 2014-08-25 | 2017-10-10 | General Electric Company | System and method for controlling a wind turbine |
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| CN106460792A (en) * | 2014-06-20 | 2017-02-22 | 米塔科技有限公司 | System for thrust-limiting of wind turbines |
| CN105201739A (en) * | 2015-09-17 | 2015-12-30 | 南车株洲电力机车研究所有限公司 | Load control method for wind generating set |
| CN107401481A (en) * | 2016-05-18 | 2017-11-28 | 北京金风科创风电设备有限公司 | Variable pitch control method and device for wind generating set |
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